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    Subjectmbind: Restrict nodes to the currently allowed cpuset
    Currently one can specify an arbitrary node mask to mbind that includes nodes
    not allowed. If that is done with an interleave policy then we will go around
    all the nodes. Those outside of the currently allowed cpuset will be redirected
    to the border nodes. Interleave will then create imbalances at the borders
    of the cpuset.

    This patch restricts the nodes to the currently allowed cpuset.

    The RFC for this patch was discussed at
    http://marc.theaimsgroup.com/?t=116793842100004&r=1&w=2

    Signed-off-by: Christoph Lameter <clameter@sgi.com>

    Index: linux-2.6.19-mm1/mm/mempolicy.c
    ===================================================================
    --- linux-2.6.19-mm1.orig/mm/mempolicy.c 2006-12-11 19:00:38.224610647 -0800
    +++ linux-2.6.19-mm1/mm/mempolicy.c 2006-12-13 11:13:10.175294067 -0800
    @@ -882,6 +882,7 @@ asmlinkage long sys_mbind(unsigned long
    int err;

    err = get_nodes(&nodes, nmask, maxnode);
    + nodes_and(nodes, nodes, current->mems_allowed);
    if (err)
    return err;
    return do_mbind(start, len, mode, &nodes, flags);
    -
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